Xubuntu is also another great lightweight flavor of Ubuntu. It uses the Xfce Desktop Environment. The minimum RAM requirement for Xubuntu is 192MB and 256MB is recommended, so you should be more than fine with 832MB.

If you install Ubuntu and run the Classic Desktop (the desktop used in 10.04) with no effects and find that it's still too slow, you could try running another session with a different Desktop Environment.